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 > Which Size Air Hose will Pass the most air pressure?

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deandec

El Dorado Hills, CA

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Posted: 07/03/08 01:24pm Link  |  Quote  |  Print  |  Notify Moderator

I have the blue 300 Psi Campbell Hausfield air hose that seems to be a 3/4" diameter and a yellow coiled 1/4" air hose.

I want to achieve the best mix of rapid inflation and maximum pressure I can coax from my 120 Psi onboard compressor. The front 22.5 tires need 110 lbs.

Which hose will better achieve results for me in your experience?


Dean
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NORM WADDELL

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Posted: 07/03/08 01:30pm Link  |  Quote  |  Print  |  Notify Moderator

Larger diameter hose will reach
your desired pressure faster.
BOTH hoses will reach your
desired pressure. I doubt
there will be much difference
in the time to reach pressure.


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javaseuf

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Posted: 07/03/08 01:38pm Link  |  Quote  |  Print  |  Notify Moderator

The size of the hose will dictate the rate of flow (CFM) but will not affect pressure.


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Bobbo

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Posted: 07/03/08 01:39pm Link  |  Quote  |  Print  |  Notify Moderator

Once the air hose has reached pressure, which won't take long, the limiting factor will be the air flow through the valve stem. Unless you have an air hose so small that it passes less air than the valve stem, there will be no discernable difference.


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PapPappy

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Posted: 07/03/08 01:42pm Link  |  Quote  |  Print  |  Notify Moderator

The inside volume of the hose will dictate the pressure for a second or so, with the larger volume causing a decrease in pressure....but again, for only a fraction of a second, until the hose is actually filled with air, to the pressure set on the regulator. The 3/4" hose....and I doubt it's actually that large, will of course, put more air quicker, but the compressor may also have limitations as to output, and that large of a hose may not work as efficiently as you might think. A 3/8" hose is a good compromise.

Personally, I'd take along the smaller hose, since it won't make much (if any) difference when filling the tires, and it will be lighter and easier to stow away when not in use. Just be careful not to kink it....if it's the plastic hose I'm thinking of, it's easy to damage.


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DrMaserati

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Posted: 07/03/08 01:43pm Link  |  Quote  |  Print  |  Notify Moderator

The diameter of the hose has nothing to do with the amount of pressure, only the volume of air it can move at a given pressure. The ultimate deciding factor is the rate at which you can force air through the tiny valve stem on a tire. Hose size is pretty much irrelevant as long as it's more than about 3/16".


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deandec

El Dorado Hills, CA

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Posted: 07/03/08 07:01pm Link  |  Quote  |  Print  |  Notify Moderator

Ok, thanks guys for the quality assist. Yep, I wanted to carry the coiled smaller hose during travel but got tangled up in the "bigger is better" syndrome.

Plus, Blue is a "trust" color and we all know that yellow means caution.............oh well. Holiday travel got canceled due to CA fire pollution up north so have too much unplanned time on my hands.

wa8yxm

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Posted: 07/03/08 08:09pm Link  |  Quote  |  Print  |  Notify Moderator

The larger hose will pass a greater volume of air up to the limit of what can pass the tire valve.

For a very long run you might notice a difference


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